definition of adjacent angles and what is the common arm and non common arms which are are on either side of the common arm.
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Adjacent Angles: When two angles have a common arm and common vertex and their non-common arm are the either side of common arm, then they are called adjacent angles.
Non-common arms are the arms on either side of the common arm and common arm implies the arm which is common to both sides. BC is the common arm and AB, BD are non-common arms
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